Operational Data Checking

An automatic data checking system has been implemented at ECMWF to trigger warnings in case of anomalies affecting the quality or the availability of the data assimilated by the model. Selected statistical parameters (number of observations, bias correction, and mean bias-corrected background, analysis departures and probability of gross error) are checked against an expected range. An appropriate alert message (including a time series plot) is generated if statistics are outside the specified ranges. A severity level (slight, considerable, severe) is assigned to each message depending on how far statistics are from the expected values. Two kinds of ranges are used by the automatic checking: Soft and Hard limits. Soft limits are updated automatically using statistics from the last twenty days (extremes are excluded during this process). Hard limits are adjusted manually when required.

Currently, the automatic checking is limited to data passing through the minimisation process (including VarBC passive data). It's being applied twice a day to the delayed cut-off 4D-VAR cycles (00 and 12) and four times a day to the early delivery assimilation system (00,06,12 and 18).

The alarm system results are based on feedback information from the ECMWF data assimilation and consequently reflect the ECMWF data usage. Although most warnings are related to data problems, they may on occasion also be related to model issues. Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice. ECMWF accepts no responsibility for actions taken on the basis of these results.

Ensemble Data Assimilation at 2019-08-12 12:00

amsua
NOAA-15/AMSUA RADIANCES CHANNEL 9 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0663, expected range: 0.0758 0.0922
NOAA-19/AMSUA RADIANCES CHANNEL 9 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0765, expected range: 0.1061 0.1326
NOAA-19/AMSUA RADIANCES CHANNEL 8 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=1.3256, expected range: 0.6536 0.8381
iasi
METOP-B/IASI RADIANCES CHANNEL 178 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1810, expected range: 0.0771 0.0963
METOP-B/IASI RADIANCES CHANNEL 179 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2309, expected range: 0.1186 0.1767
METOP-C/IASI RADIANCES CHANNEL 178 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1460, expected range: 0.0290 0.0668
METOP-C/IASI RADIANCES CHANNEL 179 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1938, expected range: 0.0849 0.1292
METOP-C/IASI RADIANCES CHANNEL 180 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2594, expected range: 0.1516 0.2205
METOP-A/IASI RADIANCES (208 channels affected) : out of range
Severe: obs_number=100933.0000, expected range: 19148.1375 21283.5382
METOP-A/IASI RADIANCES CHANNEL 271 : out of range
Severe: stdev_fgdepar=0.2384, expected range: 0.2496 0.2496
METOP-A/IASI RADIANCES CHANNEL 362 : out of range
Severe: stdev_fgdepar=0.2307, expected range: 0.2530 0.2621
METOP-A/IASI RADIANCES CHANNEL 373 : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.2190, expected range: 0.2322 0.2547
METOP-A/IASI RADIANCES CHANNEL 379 : out of range
3 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.2118, expected range: 0.2302 0.2552
METOP-B/IASI RADIANCES (271 channels affected) : out of range
Severe: obs_number=15227.0000, expected range: 20736.8895 22733.5675
METOP-C/IASI RADIANCES (268 channels affected) : out of range
Severe: obs_number=68073.0000, expected range: 115243.3388 123465.1349
METOP-A/IASI RADIANCES CHANNEL 284 : out of range
Considerable: stdev_fgdepar=0.2169, expected range: 0.2286 0.2677
METOP-A/IASI RADIANCES CHANNEL 867 : out of range
Slight: avg_fgdepar=0.0234, expected range: 0.0323 0.1105
cris
NPP/CRIS RADIANCES CHANNEL 1149 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=2.4187, expected range: 0.1517 0.3528
NOAA20/CRIS RADIANCES CHANNEL 33 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1955, expected range: 0.1315 0.1623
NOAA20/CRIS RADIANCES CHANNEL 34 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3320, expected range: 0.2766 0.2922
NPP/CRIS RADIANCES (142 channels affected) : out of range
Severe: obs_number=14151.0000, expected range: 5816.1453 8003.2085
NPP/CRIS RADIANCES (12 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_fgdepar=0.2039, expected range: 0.0459 0.1272
NOAA20/CRIS RADIANCES (54 channels affected) : out of range
2 times in the last 10 days for at least one item
Slight: obs_number=22295.0000, expected range: 22918.3788 23367.3435
Radiosondes
All LAND TEMP WIND VECTOR DIFF (M/S) ALL LAYERS Missing
amdar
All AMDAR TEMPERATURE (K) ALL LAYERS Missing
All AMDAR WIND VECTOR DIFF (M/S) ALL LAYERS Missing
synop
All AUTOMATIC LAND SYNOP RH2M (%) Missing
ship
AUTOMATIC SHIP SURFACE PRESSURE (PA) : out of range
Considerable: obs_number=1317.0000, expected range: 1016.1500 1253.6786
buoy
MOORED BUOYS WIND VECTOR DIFF (M/S) : out of range
Considerable: obs_number=77.0000, expected range: 82.3420 92.4688